Fix: missing langs object

htdocs/core/class/html.form.class.php

@@ -2885,7 +2885,9 @@ class Form
      *	@return	int							Nb of loaded lines, 0 if already loaded, <0 if KO
      */
     function load_cache_vatrates($country_code)
-    {
+    {
+    	global $langs;
+    	
     	if (count($this->cache_vatrates)) return 0;    // Cache deja charge
 
     	$sql  = "SELECT DISTINCT t.taux, t.recuperableonly";